Device for dispensing fluid material.



G. A. LOEBEN. DEVICE FOR DISPENSING FLUID MATERIA.

, 'APPLICATION FILED DEC. 2. 1916.

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JDJEVICE lFOlEt JDJSPENSING' FLUTD MATERIA.

I specification of Letters Patent.

lPatente-d ihpr., 23, 101.

Application filed December 2, 1916. Serial No. 13l1,6915.

wardly moving plunger and the escape of,

the material is governed by means of a valve, andl my improvements relate especiallyv to the means for imparting forward movement to the plunger and opening and closing the discharge-controlling valve.

ln the/accompanying drawingslFigure 1 is a Vertical sectional view of a dispensing device constructed in accordance with niy invention, the discharge controlling valve being closed; w

lFig. 2 is a similar view with the discharge controlling valve open, and

lFig. 3 is an enlarged horizontal section on the line 3-3, Fig. 1, but omitting the brush head shown therein.

Referring in the first instance to llfigs. 1 and 2 of the drawing, 1 represents a tubular casing for containing the fluid material, such 'casing having at its forward' end a contracted nozzle 2 through which the material is discharged.v vTn the present instance T have shown the dispensing device as intended. for use in connection with a brush to which the 'material is to be supplied at intervals, Athe head a .of said brush having screw connection with the casing and said screw connection heing preferably of the multiple thread type so as to permit of quick application or removal of the brush. The device is, however, available for other uses.

That portion of the forward end of the nozzle 2 which surrounds the discharge aperture constitutes a seat for a valve -5 which forms part of, is secured to, orv is in connection with, a screw stem 0, so as to partake of the longitudinal movement of lthe latter.. The screw stem 6 is disposed by an engaging tongue and groove, or other equivalent means.

The rear end of the tube 1 is closed by a cap 8 and between said cap and'a collar 9, secured to, forming part of, or otherwise in engagement with the screw stem 6, 1 s interposed a coiled spring 10 which lmparts downward thrust to the valve 5 and tends to keep it constantly in contact with its seat at the forward'end of the nozzle 2, and thus prevent escape of material from the latter. The spring 10 surrounds a stem 11 which extends from the collar 9 through an opening in the cap 8 and through a knob 12 to which it is secured so as to turn therewith, the periphery of said knob being knurled or roughened So that it can be readily rotated bythumb and finger.

w If it is intended to rotate the knob 12 by a clockwise movement the screw stem .6 is provided with a left hand thread as shown, but if the movement of the knob 12 is intended to be counter-clockwise the thread should be rightllr` handed. Tn either case proper rotation of said knob 12 will cause forward movement of the plunger 7 within the casing 1 and consequent exertion of pressure upon the mass of fluid material in said casing in advance of the plunger. The valve 5, however, will remain seated until the mass of material in advance of the plunger opposes such resistance to further for- Ward movement of the latter as to overcoine the forward pressure of the spring 10, whereupon continued forward movement of the screw stem 6 will cause it to rise through the hub of the plunger, thereby compressing the spring 10 and opening the valve 5, as 'shown in Fig. 2, so as to permit discharge of the fluid material from the nozzle 2.

As soon, however, as the resistance of the mass of material in advance of the plunger is less than the forward pressure of the spring 10, the latter will expand and force the screw stem and plunger 7 forwardly in the casing 'so as to again. close the valve 5 and cut oif the escape of material from the nozzle 2,

Between the valve 5 and the forward end of the threadedstem 6 is interposed a valve stem which rotates with said screw stem and extends throughout the length of the nozzle 2. The valve stem is in respect to the screw stem, reduced in thickness on each filii side so as to each end an enlarged rb 14: which, by preference, is rounded on its outer face and bears snugly against the inner wall of the nozzle 2, as shown in Fig. 3.

When, therefore, the screw stem 6 is rotated, the blade 13 will stir up and agitate the mass of material contained within the nozzle and will revent the'stiffening or hardening of saidp mass to which, owing to its limited bulk, it would otherwise be subject. Atthe same time, the ribs l14, at the ends of the blade 13, scrape the inner wall of the nozzle and prevent the material from adhering thereto.

lIf the material to be dispensed is contained in a cartridge or vessel to 'be disposed within the casi 1, the plunger 7 will bear against the lnnery wall of said Cartridge and means will be employed both to .prevent rotation of the plunger in the cartridge and rotation of the latter in the casin I c aim:

1. In a device for dispensing fluid mate-` rial, the combination of a non-rotating holder for said material, a plu'nger for impresent a flat blade 13 having atl parting pressure to the material, and a rotatable screw stem for engaging said plunger and effecting forward movement of the same, said stem carrying a valve for governing t'he escape of the material from the holder and wings which contact with the surrounding wall of the non-rotating holder, and, as the screw stem is rotated, serve to scrape the material from said Wall.

2. The combination, in a device for dispensing' fluid material, of a non-rotating holder for said material, a plunger for imparting pressure to the material, and a rotatable screw stem engaging said plunger and efl'ecting forward movement of the same, said holder having at its forward end a contracted discharge nozzle with valve seat therein, said screw stem carrying a valve adapted to said seat, and wings which contact with the wall surrounding the convtracted discharge nozzle at the forward end of the holder and, as the screw stem is rotated, serve to scrape the material from said wall.

In testimony whereof I have signed my name to this speeification.

GUSTAVE A. LOEBEN. 

